Part of GED® Science: Earth & Space Science
GED® Science: The Moon, Seasons & Earth's Cycles (Deep Dive)
A deep dive into the rhythms of the sky, expanding the single 'Moon, Seasons & Reading Science Data' lesson from the GED® Earth & Space Science course into a full mini-course. You'll learn how Earth's spin and orbit make days and years, why the Moon shows phases and sometimes causes eclipses, why the seasons come from Earth's tilt (not its distance from the Sun), and how the Moon's gravity makes the tides. You'll also practice reading science data carefully. Plain language, all-new labeled diagrams, common-misconception warnings, and GED®-style practice with full explanations throughout.
📚 Course Curriculum
Earth is always doing two things at once, and mixing them up causes a lot of confusion. It spins like a top, and it travels …
Open trial session →The Moon is Earth's only natural satellite — a rocky, cratered world about a quarter of Earth's width that orbits us roughly every 27 days. …
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Why does the Moon seem to change shape over the month? It isn't really changing — we are just seeing different amounts of its lit …
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Once in a while the Sun, Earth, and Moon line up in a straight line, and one casts its shadow on another. That's an eclipse, …
Open trial session →Here is the single most misunderstood idea in Earth science. Seasons are not caused by Earth being closer to or farther from the Sun. (In …
Open trial session →The Moon doesn't just light up the night — its gravity tugs on Earth, and that pull is strong enough to move the oceans. The …
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Course Syllabus
This self-paced GED® Science course follows a 6-lesson sequence. Work through the modules in order so that each skill supports the next.
Course sequence
Module 1 - Lessons 1-3
- Day & Night: Earth's Two Motions
- The Moon: Earth's Companion
- The Phases of the Moon
Module 2 - Lessons 4-6
- Eclipses: When Sun, Earth & Moon Line Up
- The Seasons & Earth's Tilt
- Tides & Reading Science Data
Practice and completion
- Use worked examples and lesson practice to check understanding after each module.
- Review incorrect answers, explain the correction, and repeat weak skills.
- Complete the available mixed or final course practice to demonstrate readiness.
Course Outcomes
By the end of this course, learners will be able to:
- Explain the key scientific ideas and vocabulary in Day & Night: Earth's Two Motions.
- Interpret observations, data, models, or evidence related to The Moon: Earth's Companion.
- Apply scientific reasoning to questions involving The Phases of the Moon.
- Evaluate explanations and identify common errors about The Seasons & Earth's Tilt.
- Connect Tides & Reading Science Data with other course concepts in mixed practice.
- Use feedback and answer explanations to diagnose and correct mistakes.
- Complete mixed, exam-style practice with clearer reasoning and greater independence.
📝 Practice Questions
24 interactive questions with instant feedback and explanations.
Enroll for free to unlock the full practice bank after the trial sessions.